In the automated phone calls, someone speaking in an exaggerated dialect pretends to be Gillum as drums and jungle noises can be heard in the background.

A voice says at the end of the call that it was funded by The Road to Power, an Idaho neo-Nazi website and video podcast, according to the newspaper.

At one point in an audio of the call obtained by NBC, the speaker says that blacks “done made mud huts while white folk waste a bunch of time making their home out of wood an’ stone.” The caller also says he’ll pass a law letting black people escape arrest if “fo’ sho he didn’t do nothin.”

A Florida woman with a biracial daughter who received the call targeting Gillum told the Tallahassee paper that she became very emotional when she heard it.

Gillum spokesman Geoff Burgan told the newspaper said the calls were “reprehensible” and clearly came from “someone with intentions to fuel hatred and seek publicity.”

Race quickly became an issue in the Florida gubernatorial contest when Gillum’s Republican rival, Rep. Ron DeSantis, made comments that were widely viewed as a dog whistle to racists. DeSantis, strongly supported by President Donald Trump, said on Fox News after Tuesday’s primary that the “last thing we need to do is to monkey this up by trying to embrace a socialist agenda.” Gillum won the Democratic primary Tuesday, becoming the first black nominee for Florida governor.

A spokesman for DeSantis on Friday condemned the robocalls targeting Gillum as “absolutely appalling and disgusting” and said he hoped “whoever is behind this has to answer for this despicable action,” NBC reported.

There is no room for any racial politics here in Florida - none. Florida is a melting pot of people from all over the globe, and we are proud of it. No attempts to divide people by race or ethnicity will be tolerated, from anyone. THIS. STOPS. NOW. https://t.co/LX72MvP89P

The neo-Nazi robocalls about Tibbetts echo Trump’s anti-immigrant rhetoric about her death. Trump, who offered no condolences to Tibbetts’ family, instead railed this month that her accused killer was believed to be an undocumented immigrant.

Authorities confirmed to NBC that the Tibbetts’ robocalls were created by The Road to Power, but there’s little they can do about them. A spokesman for the Iowa attorney general’s office told the network Friday that it’s a “tricky First Amendment issue” because there’s no apparent effort to deceive anyone for commercial gain.

The calls, characterizing Tibbetts’ alleged killer as an “invader from Mexico,” refer to comments made by Tibbetts’ father defending Latinos at his 20-year-old daughter’s funeral Sunday.